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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
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    <title>Document</title>
    <script src="../../react18/react.development.js"></script>
    <script src="../../react18/react-dom.development.js"></script>
    <script src="../../react18/babel.min.js"></script>
</head>
    <style>
        .active{
            font-family: cursive;
        }
    </style>
<body>
    <div id="app"></div>
    <script type="text/babel">
        /* 
      jsx语法1:
        - 虚拟DOM中要混入js表达式，要用{},{}中只能写变量或者表达式,不能书写语句(表达式有返回值,语句没有返回值)
    */
        const snow='雪纷飞'
        const isActive=true
        const name=true
        const vDom = (
            <div>
                <h1>{snow}</h1>
                <p>无人可见，无人能敌</p>
                <p className={isActive?"active":""}>{name?'月':'夜'}今天心情不错</p>
            </div>
        );
     ReactDOM.createRoot(document.getElementById('app')).render(vDom)
    </script>
</body>

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